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Rapid synthesis of triangular CdS nanocrystals without any trap emission

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Abstract

Nanocrystals (NCs) with anisotropic dimensions display polarized emission compared to nano dots. Triangular prisms are good candidates for polarized optical properties and monodisperse triangular NCs are ideal for developing building blocks for novel three-dimensional superlattices due to its anisotropic dimension. Among triangular nanocrystals, CdS nanocrystals are less discussed for the past one decade of research due to the difficulty in its processing method. Though well studied very few methods for developing CdS triangular nanocrystals have been reported, and most are having drawbacks either due to the time consuming process or the products are combination of triangular as well as many other shaped NC or with trap emissions due to defects which are comparable to band emissions limits its applications in full scale. Here, we are presenting a novel method to develop 7 nm CdS triangular NCs that can solve the above mentioned problems, which would augment the usage of CdS triangular crystals for many applications, based on its anisotropic properties.

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Acknowledgments

Aby Cheruvathoor Poulose and Srivani Veeranarayanan thank the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan for the financial support, Monbukagakusho fellowship. Authors thank Prof. Katsumata for XRD and Prof. Fukushima for Photoluminescence measurements.

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Authors and Affiliations

  1. Bio Nano Electronics Research Center, Graduate School of Interdisciplinary New Science, Toyo University, Kawagoe, Saitama, 350-8585, Japan

    Aby Cheruvathoor Poulose, Srivani Veeranarayanan, Yasuhiko Yoshida, Toru Maekawa & D. Sakthi Kumar

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  1. Aby Cheruvathoor Poulose
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  2. Srivani Veeranarayanan
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  3. Yasuhiko Yoshida
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  4. Toru Maekawa
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  5. D. Sakthi Kumar
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Correspondence to D. Sakthi Kumar.

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Poulose, A.C., Veeranarayanan, S., Yoshida, Y. et al. Rapid synthesis of triangular CdS nanocrystals without any trap emission. J Nanopart Res 14, 789 (2012). https://doi.org/10.1007/s11051-012-0789-5

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  • DOI: https://doi.org/10.1007/s11051-012-0789-5

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